I can provide you with a brief summary of how Hitler came to power. In 1919, Hitler joined the German Workers' Party which later became the Nazi Party. With his oratorical skills and use of propaganda, he soon became its leader. Hitler gained popularity nationwide by exploiting unrest during the Great Depression, and in 1932 he placed second in the presidential race.
On the 23 March 1933, Hitler proposed the Enabling Law to the Reichstag. This new law gave Hitler the power to rule by decree rather than passing laws through the Reichstag and the president. If passed, the law would establish the conditions needed for dictatorial rule.
After Hindenburg's death in August 1934, Hitler became Führer and Reich Chancellor.